MECHANISMS OF LEACHING AND CORROSIONS OF VITRIFIED RADIOACTIVE WASTE FORMS
The estimation of the risk connected with the repository of radioactive waste in geological formation asks for evaluation of the resistance to leaching of the vitrified matrix for very long times so that the possibility of the normal experimentation can be exceeded. As a consequence the knowledge of the physico-chemical mechanisms which dominate the leaching phenomena can be very useful for obtaining reliable extrapolations. Many mechanisms of corrosion and leaching are possible for glasses. A very important point is then to evaluate their importance in the various conditions which are encountered. In the corrosion due to aqueous solutions three main mechanisms can be identified: ion exchange, matrix dissolution, formation of the surface layer. The work performed in the different laboratories will be presented following this scheme.
Bibliographic Reference: RADIOACTIVE WASTE MANAGEMENT AND DISPOSAL, LUXEMBOURG (GRAND-DUCHY OF LUXEMBOURG) APRIL 22-26, 1985 WRITE TO CEC LUXEMBOURG, DG XIII/A2, POB 1907 MENTIONING PAPER E 32061 ORA
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Record Number: 1989123069700 / Last updated on: 1987-01-01
Available languages: en